Career Education Corporation is responding to a new inquiry from a national accreditor related to job placement rates, according to a corporate filing by the company. The Accrediting Commission of Career Schools and Colleges has asked the company, which owns 90 for-profit college campuses, to "show cause" for why accreditation should not be withdrawn from 10 of its institutions. The inquiry stems from the company's earlier acknowledgment that it lacked sufficient documentation for some job placement data. That revelation led to a similar inquiry by another national accreditor -- the Accrediting Council for Independent Colleges and Schools -- which later cleared the company.